Here are 5 Artist Trading Cards I made awhile back.
Seaside has masking tape background that's been painted and stamped.
Dream started out as a gelli print as the background.
Tea Time was stenciled, painted,ink and heat embossed.
Image from Mischief Circus, formerly know as Deviant Scraps.
Create is a painted background with some stamping along the edges. I used a lid with painted edges to make the white circle.
This dream butterfly atc background was made with distress paints/inks and stencils. Additional paint splatter was added.